useWhile

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Diagnostic Category: lint/style/useWhile

JavaScript (and super languages)

Since: v1.0.0

Sources:

Same as: sonarjs/prefer-while

Description

Enforce the use of while loops instead of for loops when the initializer and update expressions are not needed.

Examples

Invalid

for (; x.running;) {
    x.step();
}

code-block.js:1:1 lint/style/useWhile  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Use a while loop instead of a for loop.
  
  > 1 │ for (; x.running;) {
      │ ^^^^^^^^^^^^^^^^^^
    2 │     x.step();
    3 │ }
  
  ℹ Prefer a while loop over a for loop without initialization and update.
  
  ℹ Safe fix: Use a while loop.
  
    1   │ - for·(;·x.running;)·{
      1 │ + while·(x.running)·{
    2 2 │       x.step();
    3 3 │   }

Valid

for(let x = 0; x < 10; i++) {}

let x = 0
for(; x < 10; i++) {}

for(let x = 0; x < 10;) {
    i++
}

How to configure

{
  "linter": {
    "rules": {
      "style": {
        "useWhile": "error"
      }
    }
  }
}